/<template>
  <div>
      <header>
          <slot name="head"></slot>
      </header>
      <main>
          <slot name="main"></slot>
      </main>
      <div class="btn">
          <slot name="btn"></slot>
      </div>
  </div>
</template>

<script>
export default {

}
</script>

<style>
.btn{
position:fixed;
width:100px;
height:100px;
bottom:100px;
right:20px;
background:#fcc;
}
</style>